So this is not a game, but instead a tier list. A tier list in my opinion is a rating of characters in a game from tournaments. Since this isn't really a tournament, my list might be flawed. Big time.
Anyways, this is really a rating of the starters in two parts: Beach cave to Temporal Tower, and Mystifying forest to Dark Crater.

Top
-
Pikachu: Early game coverage is great, with electric advantages. When it learns discharge, it will become the most ridiculously overpowered killer ever. Only problem I see here is Amp Plains, which has those annoying electrikes.

High
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Cyndaquil: Water dungeons will slow it down, but it is the best of all the fire types, due to it having Flame Wheel and Smokescreen and later, Flamethrower
Bulbasaur: Gets SleepPowder and Stunspore which are great. Also gets early razor leaf.
Charmander: It's slightly weaker than Cyndaquil, and doesn't have Flame Wheel, but it has smokescreen and later, Flamethrower.
Chikorita: Chikorita gets Synthesis, PoisonPowder and Razor Leaf early, and has at least above average defenses, making it hard to K.O.
Squirtle: This is the bulkiest water that gets Bubble and bite early, which is good, and late game Aqua Tail/Hydro Pump is great. Early game Shellos will hurt, due to Storm Drain.

Upper-Mid
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Mudkip: Nice coverage, has Mudshot and I think bubble, and gets Hydro Pump and I think aqua tail as well.
Vulpix: Isn't as good as Cyndaquil and Charmander, but is miles better than chimchar, and slightly better than torchic.
Piplup: Squirtle 2.0, but doesn't get bite, aqua tail, but it gets peck and isn't as bulky.
Turtwig: This guy is slightly better offensively than Chikorita, but doesn't get PoisonPowder and has lower defenses. Other than that, it's pretty good. Also gets Wood Hammer.
Shinx: A slightly weaker Pikachu, can still be put to use by discharge.
Torchic: Early Game/Mid Game isn't good, Late game IF it learns mirror move, which it probably will.

Mid
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Totodile: Really Good of Close Range! Which is bad because he can be sniped by far ranged pokemon. Learns bite which is practically the early-game Normal. Is water, which is still nice for getting Hydro Pump and I think bubble.
Phanpy: Okay, most of you think that this awesome elephant should go die. Well, I THINK NOT. This think has AncientPower and is bulky enough to Survive 10x hits in a row. If I was rating by I.Q, then, well this thing, Munchlax, and Squirtle would be higher than Pikachu due to awesome bulkyness.
Meowth: Fake out and quick attack are better than Treecko, he has thief and a nice number of dark moves which makes him over treecko.
Treecko: So what if you learn Leaf Blade and a grovyle joins your team. SO WHAT. The only long range move it has is energy ball, which is by a tm. And that tm is not allowed.
Munchlax: Is slightly less bulky than Phanpy, has Zen headbutt and if you have good luck, metronome is cool.

Low
-
Chimchar: Exactly like Treecko, but instead replace Leaf Blade with Close Combat and Energy Ball with Flamethrower.

Bottom
--
Riolu: Is really bad at battling, because he's as frail as a sponge not named spongebob which means he'll die easily.
Skitty: It's ability, Normalize is bad, because it makes all of your moves normal.

Upper Mid:
------
Cyndaquil: Pretty much Flamethrower, smokescreen, and Flame Wheel make it good. and Flamethrower.
Chikorita: This made down here, due to being completely overshadowed by Bulbasaur. What it can do, Bulbasaur can do better(excluding synthesis)
Charmander: See Cyndaquil, without flamewheel.
Mudkip: A ground move is cool, and you can see Squirtle.
Vulpix: Flash Fire helps in Dark Crater. Also flamethrower.

Mid:
----
Turtwig: Wood Hammer and heal back with Drain moves/synthesis. I rated this to here because the other grasses are more bulkier/powerful.
Totodile: I don't see much for it here. I think this learns crunch though. Hydro Pump is nice, though.
Munchlax: Metronome, bulkyness, zen headbutt, stockpile?, swallow?. Need I say more?
Phanpy: Earthquake, bulkyness, ancientpower. Need I say More?
Treecko: Leaf blade is useful... I guess. You can keep quick attack. Maybe absorb. Not too sure on this one.

Lower Mid:
---
Chimchar: Close combat.... He doesn't have much. Fire moves lack a little in power. Maybe he can just spam ember or something. I think he learns flare blitz, but I'm not sure.
Meowth: Dark moves put him over eevee.
Eevee: The difference here is almost hard to tell. Eevee has sand attack, but Meowth has fake out. Either Evasion or Flinch.
Riolu: He moves a little higher due to forcepalm.... but that isn't saying much.

Low:
-
Piplup: He has a disadvantage from mystifying forest, and doesn't get it back in dark crater.

Bottom:
-
Skitty: Luckily for her, there are barely any steel/rock/ghost types post game. She also learns sing/doubleslap.

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

We aren't using TM's which means treecko should be lower because he now doesn't have a range move to hit far off enemies (excluding quick attack) and no room moves. By your ideal response, you have shown me that treecko should be lower. On the 2nd list he is 3rd place, but are you talking about 1st, I suppose on 2nd he will be under lets say, Mid tier. On the other hand, he is one of the few( Waters have the best early game, and pikachu and meowth and him know quick attack.) I'll put him over, lets see, Munchlax. And also about the fire dungeon arguement, your partner and leader should take 1 damage every hit, unless you are completely underleveled.

*CHANGES TO THE LIST* 1st listTreecko and Meowth over munchlax. Eevee and meowth are seperated

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

I agree grovyle is awesome and Sceptile is also cool but Blaziken could kick both their butts with Blazekick!!!!Ha ha ha ha!

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

I agree grovyle is awesome and Sceptile is also cool but Blaziken could kick both their butts with Blazekick!!!!Ha ha ha ha!

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

I agree grovyle is awesome and Sceptile is also cool but Blaziken could kick both their butts with Blazekick!!!!Ha ha ha ha!

No.... Sceptile learns EQ, and is faster than blaziken >_> Blaze kick is terrible, and other moves are better.

*NOTE: I AM NOT SAYING THIS JUST BECAUSE GROVYLE IS MY SECOND FAVOURITE POKEMON.

Ok. I think Treecko should be higher, because Leaf Blade is not only strong, but it has a good chance of a Critical Hit. There aren't many fire dungeons either, and you can use Energy Ball as a TM. And this might not help my case but Treecko evolves into Grovyle, and if the player really wants Grovyle back from the main storyline *cough me cough* then you can just evolve Treecko. Furthermore, Quick Attack is learnt very early and is medium-range, I think.

I agree grovyle is awesome and Sceptile is also cool but Blaziken could kick both their butts with Blazekick!!!!Ha ha ha ha!

No.... Sceptile learns EQ, and is faster than blaziken >_> Blaze kick is terrible, and other moves are better.

In my absence, I was playing tons of PMD2 and now this is V 0.2 of the tier list. I saw that I had rated things too high, and too low, but now I can redo it.

The list will be seperated into 6 groups: God, Top, High, Mid, Low, Fail. By no means are the pokemon bad if they are in the lower half, you can beat the game with virtually any team, just that the higher groups have better advantages over levels.

Changes will be horribly revised, the tier list might just change for good.

Beach Cave- Temporal Tower

God:
Pikachu: Early thundershock never hurts. Has a great advantage over early game, then starts to slow after amp plains and the 2-part desert(one was called quicksand cave) Discharge owns a bunch of things.